/*

    This file is part of Hometree.

    Hometree is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Hometree is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with Hometree.  If not, see <http://www.gnu.org/licenses/>.

    Copyright 2011,2012 Roman Held

*/
#ifndef _HTR_PERSISTENT_SERVICE_HEADER_
#define _HTR_PERSISTENT_SERVICE_HEADER_

#include <QObject>
#include <QMap>
#include <QString>

class HtrPersistentService : public QObject
{
  Q_OBJECT
  public:
    HtrPersistentService(const QString &name, QObject *parent = NULL);

    // save an QObject persistant
    virtual void store(QObject *obj) = 0;
    
    // remove an object from cache
    virtual void clear(QObject *obj) = 0;

    // restore all saved QObjects:
    virtual QList<QObject*> restoreAll() = 0;
 
    // for restoring: 
    void addFactory(QMetaObject factory);

    // just for info:
    QString name() const;

  protected:
    QObject *create(const QString &className);

  private:
    QMap<QString,QMetaObject>  mFactories;
    QString                    mName;
};

#endif
